import 'package:fis_jsonrpc/services/remedical.m.dart';
import 'package:fis_measure/interfaces/process/items/item_metas.dart';
import 'package:vid/us/vid_us_unit.dart';

class ItemMetaConverter {
  ItemMetaConverter(this.dto);

  final ItemMetaDTO dto;

  late String _measureType = dto.measureTypeName!;

  late final List<ItemOutputMeta> _outputs;
  late final List<ItemMeta> _childItems = [];

  /// 输出测量项元
  ItemMeta output() {
    if (dto.multiMethodItems != null && dto.multiMethodItems!.isNotEmpty) {
      _loadMulti();
    } else if (dto.methodChildItems != null &&
        dto.methodChildItems!.isNotEmpty) {
      _loadCombo();
    } else {
      _loadSimple();
    }
    _outputs = _convetOutputsFromCalc(dto.calculator!);

    final meta = ItemMeta(
      dto.name!,
      measureType: _measureType,
      description: dto.description!,
      briefAnnotation: dto.briefAnnotation ?? '',
      outputs: _outputs,
      childItems: _childItems,
    );

    return meta;
  }

  /// 简单测量
  void _loadSimple() {
    //
  }

  /// 组合测量
  void _loadCombo() {
    for (var child in dto.methodChildItems!) {
      _childItems.add(_convertChildItem(child));
    }
  }

  /// 多测量方法
  void _loadMulti() {
    final workingItem = dto.multiMethodItems!.firstWhere((e) => e.isWorking);
    _measureType = workingItem.measureTypeName!;

    if (workingItem.childItems != null && workingItem.childItems!.isNotEmpty) {
      for (var child in workingItem.childItems!) {
        _childItems.add(_convertChildItem(child));
      }
    }
  }

  static ItemMeta _convertChildItem(ChildItemMetaDTO c) {
    return ItemMeta(
      c.name!,
      measureType: c.measureTypeName!,
      description: c.description ?? '',
      outputs: _convetOutputsFromCalc(c.calculator!),
      childItems: [],
    );
  }

  static List<ItemOutputMeta> _convetOutputsFromCalc(
      CalculatorMetaDTO calcDto) {
    return calcDto.availableOutputs!
        .where((e) => e.isWorking == true)
        .map((e) => _convetOutputFromDto(e))
        .toList();
  }

  static ItemOutputMeta _convetOutputFromDto(OutputItemMetaDTO o) {
    return ItemOutputMeta(
      o.name!,
      o.description!,
      VidUsUnitMap.getUnit(o.unit),
    );
  }
}